henceforth vs subsequently

henceforth

adv
  • From now on; from this time on. 

  • Further within this document. 

subsequently

adv
  • Following, afterwards in either time or place. 

  • Accordingly, therefore (implying a logical connection or deduction), consequently. 

How often have the words henceforth and subsequently occurred in a corpus of books? (source: Google Ngram Viewer )